<template>
  <div class="comment-post">
    <van-field
      class="post-field"
      v-model.trim="message"
      rows="2"
      autosize
      type="textarea"
      maxlength="50"
      placeholder="请输入留言"
      show-word-limit
    />
    <van-button 
      class="post-btn" 
      @click="onPost" 
      :disabled="!message.length"
    >发布</van-button>
  </div>
</template>

<script>
import { addComment } from '@/api/comment.js'
export default {
  name: 'CommentPost',
  data() {
    return {
      message: ''
    }
  },
  props:{
    target:{
      type:[Number,String,Object],
      required:true
    }
  },
  methods:{
    // 发布评论
    async onPost(){
      this.$toast.loading({
        message: '发布中...',
        forbidClick: true,
        duration: 0
      });
      try {
        const{ data } =await addComment({
          target:this.target, // 评论的目标 id
          content:this.message, // 评论内容
          art_id:null // 文章id，对评论内容发表回复时，需要传递此参数，表明所属文章id。对文章进行评论，不要传此参数。
        })

        this.message= ''
        this.$emit('post-success', data.data)

        this.$toast.success('发布成功')
      } catch (error) {
        this.$toast.fail('发布失败')
      }
    }
  }
}
</script>

<style scoped lang="less">
.comment-post {
  display: flex;
  align-items: center;
  padding: 32px 0 32px 32px;
  .post-field {
    background-color: #f5f7f9;
  }
  .post-btn {
    width: 150px;
    border: none;
    padding: 0;
    color: #6ba3d8;
    &::before {
      display: none;
    }
  }
}
</style>